Add async pattern for package upgrades with unreachable tolerance

roles/upgrade/tasks/main.yml

@@ -1,14 +1,59 @@
 ---
 # roles/upgrade/tasks/main.yml
+#
+# Async pattern: Tailscale may restart during upgrade, dropping SSH.
+# Fire and forget → poll status with unreachable tolerance + retries.
 
 - name: Upgrade all packages (Alpine)
   community.general.apk:
     upgrade: true
     update_cache: true
+  async: 3600
+  poll: 0
+  register: alpine_upgrade
+  # By default async job return change: true
+  # Force adapting the change condition for idempotency
+  changed_when: false
   when: ansible_facts['os_family'] == "Alpine"
 
+- name: Wait for Alpine upgrade
+  ansible.builtin.async_status:
+    jid: "{{ alpine_upgrade.ansible_job_id }}"
+  register: alpine_result
+  until: alpine_result.finished
+  retries: 60
+  delay: 10
+  # By default async job return change: true
+  # Force adapting the change condition for idempotency
+  changed_when: alpine_result.changed | default(false)
+  ignore_unreachable: true
+  when:
+    - ansible_facts['os_family'] == "Alpine"
+    - alpine_upgrade.ansible_job_id is defined
+
 - name: Upgrade all packages (Debian)
   ansible.builtin.apt:
     upgrade: full
     update_cache: true
+  async: 3600
+  poll: 0
+  register: debian_upgrade
+  # By default async job return change: true
+  # Force adapting the change condition for idempotency
+  changed_when: false
   when: ansible_facts['os_family'] == "Debian"
+
+- name: Wait for Debian upgrade
+  ansible.builtin.async_status:
+    jid: "{{ debian_upgrade.ansible_job_id }}"
+  register: debian_result
+  until: debian_result.finished
+  retries: 60
+  delay: 10
+  # By default async job return change: true
+  # Force adapting the change condition for idempotency
+  changed_when: debian_result.changed | default(false)
+  ignore_unreachable: true
+  when:
+    - ansible_facts['os_family'] == "Debian"
+    - debian_upgrade.ansible_job_id is defined